Welcome aboard the legendary "Academician Keldysh”, a research vessel that has played a big part in many scientific projects. Built in 1980, she has 17 laboratories and now, she also carries two self-propelled submersibles for submarine exploration. On this voyage, the scientists are conducting several important experiments concerning changes in the world’s oceans. The vessel navigates into the Arctic Circle, close to the Arctic shelf, a disputed territory with several nations staking their claims on it.

Here's a question: What's the difference between B, G and N routers?The biggest differences are speed and range. B, G and N refer to wireless standards, with B being the oldest and N being the newest.B routers are the slowest, and they have the least range. And they don't make anymore. So don't worry too much about seeing one in a store.For most consumers, the choice will be between wireless G and N.G routers send data faster and reach further than B routers. As long as your internet service and all your devices support it, a G router could get you speeds up to 54 Mbps.Jumping up to an N router usually costs more, but it will get you more speed and range. Plus, it'll get you a higher frequency.G routers are stuck on 2.4 GHz, which means they're using the same frequency as many home appliances. N routers can use the 5 GHz band, so things like your microwave are less likely to interrupt the signal.N routers are some of the fastest you'll encounter at an electronics store. They offer speeds up to 300 Mbps, again, as long as your internet and devices support it.If you want more router tips, or to see past weeks' questions, visit the Ask Newsy topics page: newsy.com/topics/ask-newsy.This video includes images from John Caserta / CC BY 3.0, Sri Kadimisetty / CC BY 3.0 and iconic / CC BY 3.0.

Reefs are disappearing.Stag-horn coral is one of the dominant building blocks of coral reefs all over the world, but now they're in trouble.A collection of new studies shows stag-horn coral is in major decline because they can't handle the warmer, more acidic ocean waters that result from human pollution.The most visible effect is bleaching. When water conditions get too stressful, corals lose the algae that give them their color. If it keeps up for too long, the corals die.Recent surveys suggest 93 percent of corals in Australia's Great Barrier Reef are bleaching to some degree.Researchers warn stag-horn reefs near the mouth of the Amazon River are also at risk. Nearby oil drilling presents a "major environmental challenge."But recovery is still possible. Scientists say tighter controls on runoff and dredging would give corals a better chance in today's warmer waters.

This is NASA's live-stream of the International Space Station. If you watch carefully, you can spot the moment the vast government conspiracy hiding the existence of aliens from us shatters into pieces.This weird little shred of prismatic light doesn't vanish with the other reflections; instead, it seems to dance above the horizon for a few moments — until the NASA feed mysteriously cuts off. All we're left with is a blue screen and a lot of questions.So what was that unusual shape? We're not saying it was aliens ... because it probably wasn't aliens. But quite a few other people think this might be the real McCoy.The attention has prompted NASA to tell the public it didn't manually shut off the live-stream. A NASA rep told ValueWalk "the station regularly passes out of range of the Tracking and Relay Data Satellites." Of course, that's just what NASA would say, isn't it ...We're inclined to believe NASA though; its live-streams are prone to both sudden blue screens and weird-looking lens flares. We have to assume the majority of these aren't aliens.This is only the latest UFO to show up on the ISS live-stream, though past sightings have borne a strong resemblance to lens flares as well.

Rome has reached the grand old age of 2,769.To celebrate the foundation of the Italian capital, a parade was held to portray key moments from its history. The Roman historical group organized the display, in which more than 2,000 people dressed as gladiators, soldiers, senators, dancers and priestesses participated.

The observational skills and quick-wits of a policeman in the Chinese city of Hangzhou have potentially saved dozens of lives. He put cones out immediately after spotting a crack on the ground at a busy crossroads.

President Barack Obama says the United States isn't taking seriously North Korea's latest statements about being ready to halt its nuclear tests if the U.S. would suspend its annual military exercises with South Korea.

One of Africa's most popular musicians, Papa Wemba, has died at the age of 66. The Congolese artist collapsed on stage while performing at a music festival in Ivory Coast.Gerald Tan looks back at the life of the musician who brought African rumba to a global audience.

The sun has been shining from one of the greatest ever feats in aviation history. A solar-powered plane has completed a three-day, non-stop flight over the Pacific Ocean. Al Jazeera's correspondent Rob Reynolds reports from Mountain View, California.

British Government estimates say that there are around 13,000 people in modern day slavery in the UK. That's according to the antislavery movement. Al Jazeera investigators have uncovered evidence of widespread slavery in the UK - where car wash workers say they're being exploited and underpaid. Our researchers found cleaners, hard at work, for next to nothing at car dealerships. Al Jazeera's findings suggest abuse on a massive scale as David Harrison reports.

Turkish and European leaders have met on the Syrian border in an attempt to highlight the flow of refugees into Europe is slowing. Under a controversial deal refugees arriving in Greece can be deported to Turkey if they are not able to claim asylum in Europe. But critics say the plan is illegal and have raised concerns over the treatment of refugees once they are returned to Turkey.

Al Jazeera's Investigative Unit goes undercover to reveal the true scale of modern slavery in suburban Britain. We expose the slave masters and the people smugglers and talk to victims about their ordeals.

Have a look in our second page the full documentary posted few minutes ago.

The Turkish police have detained a Dutch columnist over a critical tweet she posted about Turkish President Recep Erdogan, her newspaper said. The woman intends to go back to the Netherlands after being released. Ebru Umar is a Dutch columnist of Turkish origin, who writes for several newspapers, including Metro. On Saturday, the Turkish police detained her at the resort of Kusadasi and seized her laptop, the newspaperreported.

Umar said she was questioned about critical tweets about the Turkish president. She expects to be released soon and leave for the Netherlands, Metro reported. Dutch and Turkish officials couldn't immediately be reached for comment, the newspaper said.

It comes amid public outcry in the Netherlands over a letter sent by a Turkish consular to its citizens asking to report insults to the Turkish leader they encounter.

The Turkish authorities have launched some 2,000 lawsuits against people accused of insulting Erdogan. Umar is a regular guest on Dutch TV panels on Muslim-related issues. She has a reputation for being highly critical of Islam and was reportedly targeted with retaliation in Amsterdam.